forked from rancher/convoy
/
docker.go
209 lines (164 loc) · 4.87 KB
/
docker.go
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package main
import (
"encoding/json"
"fmt"
"github.com/rancherio/rancher-volume/api"
"github.com/rancherio/rancher-volume/util"
"net/http"
)
type PluginInfo struct {
Implements []string
}
type PluginResponse struct {
Mountpoint string `json:",omitempty"`
Err string `json:",omitempty"`
}
type PluginRequest struct {
Name string
}
func (s *Server) dockerActivate(w http.ResponseWriter, r *http.Request) {
log.Debugf("Handle plugin activate: %v %v", r.Method, r.RequestURI)
info := PluginInfo{
Implements: []string{"VolumeDriver"},
}
writeResponseOutput(w, info)
}
func getDockerVolumeName(r *http.Request) (string, error) {
request := &PluginRequest{}
if err := json.NewDecoder(r.Body).Decode(request); err != nil {
return "", err
}
return request.Name, nil
}
func (s *Server) getDockerVolume(r *http.Request, create bool) (*Volume, error) {
name, err := getDockerVolumeName(r)
if err != nil {
return nil, err
}
var (
volume *Volume
volumeUUID string
volumeName string
)
if util.ValidateUUID(name) {
volumeUUID = name
volume = s.loadVolume(name)
} else if util.ValidateName(name) {
volumeName = name
volume = s.loadVolumeByName(name)
} else {
// Not valid UUID or name
return nil, fmt.Errorf("Invalid volume name. Must be a valid UUID or only contains 0-9, a-z, understore(_) and dot(.)")
}
if volume == nil {
if create {
log.Debugf("Create a new volume %v for docker", name)
volume, err = s.processVolumeCreate(volumeUUID, volumeName, "", s.DefaultVolumeSize, true)
if err != nil {
return nil, err
}
} else {
return nil, fmt.Errorf("Cannot find volume %v", name)
}
}
return volume, nil
}
func dockerResponse(w http.ResponseWriter, mountPoint string, err error) {
e := PluginResponse{
Mountpoint: mountPoint,
}
if err != nil {
e.Err = err.Error()
}
writeResponseOutput(w, e)
}
func (s *Server) dockerCreateVolume(w http.ResponseWriter, r *http.Request) {
s.GlobalLock.Lock()
defer s.GlobalLock.Unlock()
log.Debugf("Handle plugin create volume: %v %v", r.Method, r.RequestURI)
volume, err := s.getDockerVolume(r, true)
if err != nil {
dockerResponse(w, "", err)
return
}
log.Debugf("Found volume %v (name %v) for docker", volume.UUID, volume.Name)
dockerResponse(w, "", nil)
}
func (s *Server) dockerRemoveVolume(w http.ResponseWriter, r *http.Request) {
s.GlobalLock.Lock()
defer s.GlobalLock.Unlock()
log.Debugf("Handle plugin remove volume: %v %v", r.Method, r.RequestURI)
volume, err := s.getDockerVolume(r, false)
if err != nil {
dockerResponse(w, "", err)
return
}
if err := s.processVolumeDelete(volume.UUID); err != nil {
dockerResponse(w, "", err)
return
}
log.Debugf("Removed volume %v (name %v) for docker", volume.UUID, volume.Name)
dockerResponse(w, "", nil)
}
func (s *Server) dockerMountVolume(w http.ResponseWriter, r *http.Request) {
s.GlobalLock.Lock()
defer s.GlobalLock.Unlock()
log.Debugf("Handle plugin mount volume: %v %v", r.Method, r.RequestURI)
volume, err := s.getDockerVolume(r, false)
if err != nil {
dockerResponse(w, "", err)
return
}
if volume.MountPoint != "" {
dockerResponse(w, "", fmt.Errorf("Volume %v (name %v) is already mounted at %v", volume.UUID, volume.Name, volume.MountPoint))
return
}
mountConfig := &api.VolumeMountConfig{
FileSystem: "ext4",
NeedFormat: false,
}
mountConfig.MountPoint, err = s.getVolumeMountPoint(volume.UUID, "")
if err != nil {
dockerResponse(w, "", err)
return
}
log.Debugf("Mount volume: %v (name %v) to %v for docker", volume.UUID, volume.Name, mountConfig.MountPoint)
if err := s.processVolumeMount(volume, mountConfig); err != nil {
dockerResponse(w, "", err)
return
}
dockerResponse(w, mountConfig.MountPoint, nil)
}
func (s *Server) dockerUnmountVolume(w http.ResponseWriter, r *http.Request) {
s.GlobalLock.Lock()
defer s.GlobalLock.Unlock()
log.Debugf("Handle plugin unmount volume: %v %v", r.Method, r.RequestURI)
volume, err := s.getDockerVolume(r, false)
if err != nil {
dockerResponse(w, "", err)
return
}
if volume.MountPoint == "" {
dockerResponse(w, "", fmt.Errorf("Volume %v (name %v) is not mounted", volume.UUID, volume.Name))
return
}
log.Debugf("Unmount volume: %v (name %v) at %v for docker", volume.UUID, volume.Name, volume.MountPoint)
mountConfig := &api.VolumeMountConfig{}
if err := s.processVolumeUmount(volume, mountConfig); err != nil {
dockerResponse(w, "", err)
return
}
dockerResponse(w, "", nil)
}
func (s *Server) dockerVolumePath(w http.ResponseWriter, r *http.Request) {
s.GlobalLock.RLock()
defer s.GlobalLock.RUnlock()
log.Debugf("Handle plugin volume path: %v %v", r.Method, r.RequestURI)
volume, err := s.getDockerVolume(r, false)
if err != nil {
dockerResponse(w, "", err)
return
}
log.Debugf("Volume: %v (name %v) is mounted at %v for docker", volume.UUID, volume.Name, volume.MountPoint)
dockerResponse(w, volume.MountPoint, nil)
}